Introduction: The purpose of the current study was to investigate the effect of X-ray spectra on the sensitivity of a polymer gel dosimeter imaged with a conventional computed tomography (CT) scanner. Material and Methods: The whole process of CT imaging of an irradiated polymer gel was simulated by MCNPX Monte Carlo (MC) code. The imaging of polyacrylamide gel was accomplished by means of a co...

This paper describes the system analysis and control design of an electrohydraulic servo-drive using a nonlinear composite feedback control approach based on singular perturbation theory (Kokotovic, Khalil & O’Reilly 1986). A comparison with linear output feedback (P-control) and linear state feedback (LQRdesign) shows the bene¿ts of the proposed method. The nonlinear control design features fe...

Model based feedback control strategies for electrohydraulic braking and active steering systems in passenger cars are considered. Simulation results with a complex vehicle model and measurements from test drives with a real car are shown for brake control. For a μ-split road surface additional drive dynamics control is required like ESP or active front steering (AFS). Therefore, an AFS feedbac...

In this paper, a novel model-based controller for a six Degree-of-Freedom (dof) electrohydraulic Stewart–Gough platform is developed. Dynamic models of low complexity are employed that describe the salient dynamics of the main electrohydraulic components. Rigid body equations of motion and hydraulics dynamics, including friction and servovalve models are used. The developed feedback controller ...

A totally implantable artificial heart actuated by an electrohydraulic energy converter is described and the requirements for its physiological control scheme are listed. Eased on these specifications and on previous work done in our laboratory on control schemes for the Electro-Hydraulic Total Artificial Heart (EHTAH), preliminary experiments were conducted which confirmed the feasibility of t...